<template>
    <div>
      <!--      面包导航-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
<!--      卡片视图-->
      <el-card>
<!--        添加角色按钮区域-->
        <el-row>
          <el-col>
            <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>
<!--        角色列表区域-->
        <el-table :data="rolelist" border stripe>
<!--          展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
<!--                渲染一级权限-->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
<!--                渲染二级 三级权限-->
                <el-col :span="19">
<!--                  通过for循环 嵌套循环二级权限-->
                  <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                      <el-col :span="6">
                        <el-tag closable @close="removeRightById(scope.row,item2.id)" type="success">{{item2.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="18">
                        <el-tag @close="removeRightById(scope.row,item3.id)" closable type="warning" v-for="(item3) in item2.children" :key="item3.id">
                          {{item3.authName}}
                        </el-tag>
                      </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
<!--          索引列-->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
              <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
              <el-button @click="showSetRightDialog(scope.row)" type="warning" icon="el-icon-setting" size="mini">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
<!--      分配权限对话框-->
      <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisiable"
            width="50%"
            @close="setRigtDialogClosed">
<!--            树形控件-->
            <el-tree
              show-checkbox
              default-expand-all
              node-key="id"
              :default-checked-keys="defKeys"
              :data="rightslist"
              :props="treeProps"
              ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisiable = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  name: 'Roles',
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框显示隐藏
      setRightDialogVisiable: false,
      // 所有权限数据
      rightslist: [],
      // 树形控件属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取数据失败')
      this.rolelist = res.data
      // console.log(this.rolelist)
    },
    // 根据ID删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用书是否删除
      var confirmRes = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmRes !== 'confirm') return this.$message.error('取消了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      // 不建议 网页会刷新
      // this.getRolesList()
      role.children = res.data
      this.$message.success('删除权限成功')
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败')
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      // console.log(this.rightslist)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisiable = true
    },
    // 通过递归形式获取三级权限 并保存到defkeys
    getLeafKeys (node, arr) {
      // 如果当前节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框关闭事件
    setRigtDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      // console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      // 更新权限列表
      this.getRolesList()
      this.$message.success('分配权限成功')
      this.setRightDialogVisiable = false
    }
  }
}
</script>

<style scoped lang="less">
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
